PURPOSE: To simplify the structure and to improve the operationability by employing such structure where the pusher moving path of only one of the first and second trolley conveyors crossing each other is seaparated or went around at the intersection to perform the exchanging of path.

CONSTITUTION: Rotary rail 17 is provided at the intersection of the first and second trolley conveyors 15, 16 crossing perpendicularly at approximately same level. The pusher moving path 4a of the conveyor 15 is continuing with regular interval against a trolley guide rail 3 even at the intersection, while the pusher moving path of the conveyor 16 is separated into upstream side and down stream side at the intersection. The rotary rail 17 is constructed rotatably around the shaft 19 through a rotary boss 20 and a gate frame 18 when the cylinder 21 is operating, where the cam groove 29 and cam roller 30 function to depress the guide rail 3 of conveyor 16 to slightly lower position.